Keycloak Cluster based on Docker + JDBC_PING

Note: this demonstrates issues creating session on keycloak cluster

Related discussions:

• https://issues.jboss.org/browse/KEYCLOAK-9855
• http://lists.jboss.org/pipermail/keycloak-user/2019-March/017511.html

Start the cluster

# just start
docker-compose -f docker-compose.yml -f docker-compose.ports.yml up

# restart and rebuild
docker-compose down && docker-compose -f docker-compose.yml -f docker-compose.ports.yml up --build

Create Sessions

Cluster (this fails and demonstrates the issue)

open http://localhost:8000/auth/realms/example/account

# Username `user`
# Password `password`

# => fails with the following error on the UI:
# 1st try (or cleared cookies) => "An error occurred, please login again through your application."
# 2nd try (with existing cookies) => "You are already logged in."

Single Node

open http://localhost:8081/auth/realms/example/account

# Username `user`
# Password `password`

# => works, the "Edit Account" view is shown

Analyse Internals

Container Logs

[...]
keycloak1_1       | 15:12:34,152 INFO  [org.infinispan.CLUSTER] (remote-thread--p8-t5) [Context=work] ISPN100010: Finished rebalance with members [keycloak1, keycloak2], topology id 5
keycloak1_1       | 15:12:34,152 INFO  [org.infinispan.CLUSTER] (remote-thread--p8-t1) [Context=clientSessions] ISPN100010: Finished rebalance with members [keycloak1, keycloak2], topology id 5
keycloak1_1       | 15:12:34,164 INFO  [org.infinispan.CLUSTER] (remote-thread--p8-t7) [Context=authenticationSessions] ISPN100010: Finished rebalance with members [keycloak1, keycloak2], topology id 5
[...]

JDBC_PING MySQL Status

$ mysql --host 127.0.0.1 --user root --password=root --database keycloak --execute "select * from JGROUPSPING;"

mysql: [Warning] Using a password on the command line interface can be insecure.
+--------------------------------------+-----------+---------------------+--------------+------------------------------------------+
| own_addr                             | bind_addr | created             | cluster_name | ping_data                                |
+--------------------------------------+-----------+---------------------+--------------+------------------------------------------+
| 6d69d5f7-4c84-18cb-6d64-dd2ddb2b3c99 | keycloak1 | 2019-03-21 15:12:31 | ejb          | md�-�+<�mi��L�� 	keycloak1� ���            |
| f976f2e6-c4f5-ada4-796f-99f1c3b97193 | keycloak1 | 2019-03-21 15:12:31 | ejb          | yo��ùq��v���� 	keycloak2� ���                |
+--------------------------------------+-----------+---------------------+--------------+------------------------------------------+

Health Check Module

$ curl http://localhost:8081/auth/realms/master/health/check
{
  "details": {
    "infinispan": {
      "numberOfNodes": 2,
      "state": "UP",
      "healthStatus": "HEALTHY",
      "nodeNames": [
        "keycloak1",
        "keycloak2"
      ],
      "cacheDetails": [
        {
          "cacheName": "realms",
          "healthStatus": "HEALTHY"
        },
        {
          "cacheName": "authenticationSessions",
          "healthStatus": "HEALTHY"
        },
        {
          "cacheName": "sessions",
          "healthStatus": "HEALTHY"
        },
        {
          "cacheName": "authorizationRevisions",
          "healthStatus": "HEALTHY"
        },
        {
          "cacheName": "work",
          "healthStatus": "HEALTHY"
        },
        {
          "cacheName": "keys",
          "healthStatus": "HEALTHY"
        },
        {
          "cacheName": "clientSessions",
          "healthStatus": "HEALTHY"
        },
        {
          "cacheName": "users",
          "healthStatus": "HEALTHY"
        },
        {
          "cacheName": "loginFailures",
          "healthStatus": "HEALTHY"
        },
        {
          "cacheName": "offlineClientSessions",
          "healthStatus": "HEALTHY"
        },
        {
          "cacheName": "authorization",
          "healthStatus": "HEALTHY"
        },
        {
          "cacheName": "realmRevisions",
          "healthStatus": "HEALTHY"
        },
        {
          "cacheName": "offlineSessions",
          "healthStatus": "HEALTHY"
        },
        {
          "cacheName": "actionTokens",
          "healthStatus": "HEALTHY"
        },
        {
          "cacheName": "userRevisions",
          "healthStatus": "HEALTHY"
        }
      ],
      "clusterName": "ejb"
    },
    "database": {
      "connection": "established",
      "state": "UP"
    },
    "filesystem": {
      "freebytes": 13042221056,
      "state": "UP"
    }
  },
  "name": "keycloak",
  "state": "UP"
}

Resources

• https://www.keycloak.org/docs/latest/server_installation/index.html#_clustering